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  • Other Sources  (5)
  • MACHINE ELEMENTS AND PROCESSES  (2)
  • ASTRODYNAMICS  (1)
  • BIOTECHNOLOGY  (1)
  • COMPUTERS  (1)
  • 1970-1974  (5)
  • 1
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    Degradation due to contaminants throughout the test cycle (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Inspection techniques for determining degradation due to contamination during fabrication of spacecraft components
    Keywords: MACHINE ELEMENTS AND PROCESSES
    Type: OPT. TELESCOPE TECHNOL. 1970; P 751-757
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    User's manual for the Simulated Life Analysis of Vehicle Elements (SLAVE) model (1972)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The simulated life analysis of vehicle elements model was designed to perform statistical simulation studies for any constant loss rate. The outputs of the model consist of the total number of stages required, stages successfully completing their lifetime, and average stage flight life. This report contains a complete description of the model. Users' instructions and interpretation of input and output data are presented such that a user with little or no prior programming knowledge can successfully implement the program.
    Keywords: MACHINE ELEMENTS AND PROCESSES
    Type: NASA-CR-123642 , ASD-ASTN-1519
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    The MSFC UNIVAC 1108 EXEC 8 simulation model (1972)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A model is presented which simulates the MSFC Univac 1108 multiprocessor system. The hardware/operating system is described to enable a good statistical measurement of the system behavior. The performance of the 1108 is evaluated by performing twenty-four different experiments designed to locate system bottlenecks and also to test the sensitivity of system throughput with respect to perturbation of the various Exec 8 scheduling algorithms. The model is implemented in the general purpose system simulation language and the techniques described can be used to assist in the design, development, and evaluation of multiprocessor systems.
    Keywords: COMPUTERS
    Type: NASA-CR-61379
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    Outer planet mission guidance and navigation for spinning spacecraft (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The orbit determination accuracies, maneuver results, and navigation system specification for spinning Pioneer planetary probe missions are analyzed to aid in determining the feasibility of deploying probes into the atmospheres of the outer planets. Radio-only navigation suffices for a direct Saturn mission and the Jupiter flyby of a Jupiter/Uranus mission. Saturn ephemeris errors (1000 km) plus rigid entry constraints at Uranus result in very high velocity requirements (140 m/sec) on the final legs of the Saturn/Uranus and Jupiter/Uranus missions if only Earth-based tracking is employed. The capabilities of a conceptual V-slit sensor are assessed to supplement radio tracking by star/satellite observations. By processing the optical measurements with a batch filter, entry conditions at Uranus can be controlled to acceptable mission-defined levels (+ or - 3 deg) and the Saturn-Uranus leg velocity requirements can be reduced by a factor of 6 (from 139 to 23 m/sec) if nominal specified accuracies of the sensor can be realized.
    Keywords: ASTRODYNAMICS
    Type: NASA-CR-136764
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    Mishaps with Oxygen in NASA Operations (1971)
    In:  CASI
    Details
    Publication Date: 2019-08-14
    Description: Data from a substantial number of oxygen mishaps obtained from NASA and contractor records are presented. Information from several Air Force records, concerning oxygen accidents involving aircraft operations, are also included. Descriptions of the mishaps and their causes, for both liquid and gaseous oxygen in ground test facilities and space vehicle systems, are given. A number of safety regulations aimed at reducing the accident probability is discussed. The problems related to material compatibility and materials testing are considered, and the limited information on factors affecting the ignition of materials in oxygen is presented. In addition, details are given of several of the accident/incidents listed in order to define the combination of conditions causing the mishap. In addition to propellant system mishaps, accident/incidents which occurred in space and ground system structures were included, as well as those in electrical systems, ground support facilities, ordnance, and related operations.
    Keywords: BIOTECHNOLOGY
    Type: NASA-TM-X-67953 , E-6604 , Oxygen Compressors and Pumps Symp.; Nov 09, 1971 - Nov 11, 1971; Atlanta
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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